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JEE Main levelOne or more correct optionsDifficulty 2 of 3rx031

For which of the following is the AVERAGE oxidation number of the metal or non-metal element a non-integer? Select all correct options.

AFe in $Fe X_{3} O X_{4}$
BPb in $Pb X_{3} O X_{4}$
CS in $S X_{4} O X_{6} X^{2 -}$
DCr in $Cr X_{2} O X_{7} X^{2 -}$

Answer: A, B, C

Fe X_{3} O X_{4}

:

3 x = 8

gives

8/3

.

Pb X_{3} O X_{4}

:

8/3

.

S X_{4} O X_{6} X^{2 -}

:

4 x - 12 = - 2

gives

+ 5/2

.

Cr X_{2} O X_{7} X^{2 -}

:

2 x - 14 = - 2

gives

+ 6

, an integer.

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